So, you are getting pretty good at leeching of gmane with the unsatiable straw (as in enabler of feeding?) that is tin. But, you must also be getting pretty tired of those prompts asking for what to do if there is an attached signature or the message is multipart. Also, while it was done with best intentions, setting a mailcap file for several extensions with empty viewers is a worst practice. So, I give you .tinrc, saviour of fingers which are tasked with pressing ‘n’:

# set this to blank
metamail_prog=--internal

# or this to off
ask_for_metamail=ON